System of Measurement System of Measurement |
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Material Material |
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Nut Type Nut Type | Show |
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Locking Type Locking Type |
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| Nylon Insert | Serrations |
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| Distorted Thread | Steel Insert |
Hex Nut Profile Hex Nut Profile |
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 | Standard |
Width Width |
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Height Height |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class | Show |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class  | Hide |
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Specifications Met Specifications Met |
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Thread Spacing Thread Spacing |
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Thread Direction Thread Direction |
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Thread Type Thread Type |
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Thread Fit Thread Fit |
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Drive Style Drive Style |
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 | External Hex |
Distorted Thread Type Distorted Thread Type |
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 | Top Lock |
About Nuts, Materials, and Finishes
More
Metric High-Strength Steel
Nylon-Insert Locknuts—Class 10
A nylon insert keeps metric bolt threads from coming loose due to vibration, wear, and temperature swings. About 25% stronger than medium-strength steel locknuts, these nuts are made of high-strength, Class 10 steel. They're used in valves, pumps, suspension systems, and other high-stress parts. A zinc plating prevents rust in wet areas. Combine with Class 10.9 metric bolts, which have similar strength. All are reusable but lose holding power after each use.
Some of these locknuts meet ISO 10511 (formerly DIN 985) or ISO 7040 (formerly DIN 982), which are international standards for dimensions. The ISO standards are functionally equivalent to the DIN standards with slight differences in width, height, or tolerances.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 10 | ||||||||
| M4 | 0.7 | 7 | 5 | 220° | DIN 985, ISO 10511 | 100 | 000000000 | 000000 |
| M5 | 0.8 | 8 | 5 | 220° | DIN 985, ISO 10511 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 6 | 220° | DIN 985, ISO 10511 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 8 | 220° | DIN 982, ISO 7040 | 50 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 8 | 220° | DIN 985, ISO 10511 | 50 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 9.5 | 220° | DIN 982, ISO 7040 | 25 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 10 | 220° | DIN 985, ISO 10511 | 25 | 000000000 | 00000 |
| M10 | 1.5 | 17 | 11.5 | 220° | DIN 982, ISO 7040 | 25 | 000000000 | 00000 |
| M12 | 1.75 | 19 | 12 | 220° | DIN 985, ISO 10511 | 10 | 000000000 | 0000 |
| M12 | 1.75 | 19 | 14 | 220° | DIN 982, ISO 7040 | 10 | 000000000 | 0000 |
| M14 | 2 | 22 | 14 | 220° | DIN 985, ISO 10511 | 10 | 000000000 | 00000 |
| M14 | 2 | 22 | 16 | 220° | DIN 982, ISO 7040 | 10 | 000000000 | 00000 |
| M16 | 2 | 24 | 16 | 220° | DIN 985, ISO 10511 | 10 | 000000000 | 00000 |
| M16 | 2 | 24 | 18 | 220° | DIN 982, ISO 7040 | 5 | 000000000 | 0000 |
| M18 | 2.5 | 27 | 18.5 | 220° | DIN 985, ISO 10511 | 5 | 000000000 | 00000 |
| M18 | 2.5 | 27 | 20 | 220° | DIN 982, ISO 7040 | 5 | 000000000 | 00000 |
| M20 | 2.5 | 30 | 20 | 220° | DIN 985, ISO 10511 | 5 | 000000000 | 00000 |
| M20 | 2.5 | 30 | 22 | 220° | DIN 982, ISO 7040 | 1 | 000000000 | 0000 |
| M22 | 2.5 | 32 | 22 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 0000 |
| M24 | 3 | 36 | 24 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 0000 |
| M24 | 3 | 36 | 28 | 220° | DIN 982, ISO 7040 | 1 | 000000000 | 0000 |
| M27 | 3 | 41 | 27 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
| M30 | 3.5 | 46 | 30 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 0000 |
| M33 | 3.5 | 50 | 33 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
| M36 | 4 | 55 | 36 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
| M39 | 4 | 60 | 39 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
| M42 | 4.5 | 65 | 42 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
| M45 | 5 | 75 | 48 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
Black Ultra-Corrosion-Resistant Coated Steel—Class 10 | ||||||||
| M4 | 0.7 | 7 | 5 | 220° | DIN 985 | 5 | 000000000 | 0000 |
| M5 | 0.8 | 8 | 5 | 220° | DIN 985 | 5 | 000000000 | 0000 |
| M6 | 1 | 10 | 6 | 220° | DIN 985 | 5 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 8 | 220° | DIN 985 | 5 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 10 | 220° | DIN 985 | 5 | 000000000 | 00000 |
| M12 | 1.75 | 19 | 12 | 220° | DIN 985 | 1 | 000000000 | 0000 |
| M14 | 2 | 22 | 14 | 220° | DIN 985 | 1 | 000000000 | 0000 |
Metric Fine-Thread High-Strength Steel
Nylon-Insert Locknuts—Class 10
These locknuts have a nylon insert that grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use. They're about 25% stronger than medium-strength steel locknuts and comparable in strength to Class 10.9 bolts. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 10 | ||||||||
| M8 | 1 | 13 | 8 | 220° | DIN 985, ISO 10511 | 10 | 000000000 | 000000 |
| M10 | 1 | 17 | 10 | 220° | DIN 985 | 25 | 000000000 | 0000 |
| M10 | 1.25 | 17 | 10 | 220° | DIN 985, ISO 10511 | 10 | 000000000 | 00000 |
| M12 | 1.25 | 19 | 12 | 220° | DIN 985, ISO 10511 | 10 | 000000000 | 00000 |
| M12 | 1.5 | 19 | 12 | 220° | DIN 985 | 10 | 000000000 | 0000 |
| M12 | 1.5 | 19 | 12 | 220° | DIN 985, ISO 10511 | 10 | 000000000 | 00000 |
| M14 | 1.5 | 22 | 14 | 220° | DIN 985, ISO 10511 | 5 | 000000000 | 00000 |
| M16 | 1.5 | 24 | 16 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 0000 |
| M18 | 1.5 | 27 | 18 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 0000 |
| M20 | 1.5 | 30 | 20 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
| M20 | 2 | 30 | 20 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
| M22 | 1.5 | 32 | 22 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
| M24 | 1.5 | 36 | 24 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
| M24 | 2 | 36 | 24 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
| M30 | 2 | 46 | 30 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
| M36 | 2 | 55 | 36 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
| M36 | 3 | 55 | 36 | 220° | DIN 985, ISO 10511 | 1 | 000000000 | 00000 |
High-Strength Steel Top-Lock Distorted-Thread Locknuts
An irregularly shaped thread at the top of the nut grips the bolt for a stronger hold than nylon-insert locknuts. They thread on from the bottom of the nut, allowing more threads to engage the bolt before tightening for easier installation than center-lock distorted thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. They're not reusable. Comparable in strength to Grade 8 bolts, they're about 25% stronger than medium-strength steel locknuts.
Zinc-plated and zinc yellow-chromate plated locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread | ||||||
|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 10 | ||||||
| M5 | 0.8 | 8 | 5.1 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 6 | 100 | 000000000 | 0000 |
| M8 | 1 | 13 | 8 | 50 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 8 | 50 | 000000000 | 0000 |
| M10 | 1 | 17 | 10 | 25 | 000000000 | 00000 |
| M10 | 1.5 | 17 | 10 | 25 | 000000000 | 0000 |
| M12 | 1.25 | 19 | 12 | 25 | 000000000 | 00000 |
| M12 | 1.75 | 19 | 12 | 25 | 000000000 | 00000 |
| M14 | 1.5 | 22 | 14 | 10 | 000000000 | 0000 |
| M14 | 2 | 22 | 14 | 10 | 000000000 | 0000 |
| M16 | 1.5 | 24 | 16 | 10 | 000000000 | 0000 |
| M16 | 2 | 24 | 16 | 10 | 000000000 | 0000 |
| M18 | 1.5 | 27 | 18 | 5 | 000000000 | 0000 |
| M18 | 2.5 | 27 | 18 | 5 | 000000000 | 0000 |
| M20 | 1.5 | 30 | 20 | 5 | 000000000 | 0000 |
| M20 | 2.5 | 30 | 20 | 5 | 000000000 | 0000 |
| M22 | 1.5 | 32 | 22 | 5 | 000000000 | 00000 |
| M22 | 2.5 | 32 | 22 | 5 | 000000000 | 00000 |
| M24 | 1.5 | 36 | 24 | 1 | 000000000 | 0000 |
| M24 | 3 | 36 | 24 | 1 | 000000000 | 0000 |
| M27 | 3 | 41 | 27 | 1 | 000000000 | 0000 |
| M30 | 2 | 46 | 30 | 1 | 000000000 | 0000 |
| M30 | 3.5 | 46 | 30 | 1 | 000000000 | 0000 |
| M36 | 3 | 55 | 36 | 1 | 000000000 | 0000 |
Zinc Yellow-Chromate Plated Steel—Class 10 | ||||||
| M6 | 1 | 10 | 6 | 100 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 8 | 50 | 000000000 | 0000 |
| M10 | 1.25 | 17 | 10 | 10 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 10 | 25 | 000000000 | 0000 |
| M12 | 1.25 | 19 | 12 | 5 | 000000000 | 00000 |
| M12 | 1.75 | 19 | 12 | 10 | 000000000 | 0000 |
| M14 | 2 | 22 | 14 | 10 | 000000000 | 0000 |
| M16 | 2 | 24 | 16 | 10 | 000000000 | 0000 |
| M18 | 2.5 | 27 | 18 | 5 | 000000000 | 0000 |
| M20 | 2.5 | 30 | 20 | 5 | 000000000 | 0000 |
| M24 | 3 | 36 | 24 | 1 | 000000000 | 0000 |
| M30 | 3.5 | 46 | 30 | 1 | 000000000 | 0000 |
Metric High-Strength Steel Steel-Insert
Locknuts for Extreme Vibration—Class 10
When installed, the steel insert in these metric locknuts grips the threads and lifts away from the nut body, isolating the insert from the nut’s load to resist spinoff caused by vibration. These locknuts are often used in shakers and vibrating equipment. The strength of the bolt should match the strength of the nut to prevent damaging threads. About 25% stronger than medium-strength steel locknuts, these nuts are made of high-strength, Class 10 steel.
For technical drawings and 3-D models, click on a part number.
Metric High-Strength Steel Serrated
Flange Locknuts—Class 10
Serrations grip the material surface instead of the threads for easy installation and mild vibration resistance. The flange distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. They're about 25% stronger than medium-strength steel flange locknuts and comparable in strength to Class 10.9 bolts. Height includes the flange.
Zinc-plated steel flange locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread | Flange | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 10 | |||||||||
| M5 | 0.8 | 8 | 5 | 11.8 | 1 | DIN 6923 | 25 | 000000000 | 00000 |
| M6 | 1 | 10 | 6 | 14.2 | 1.1 | DIN 6923 | 50 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 8 | 17.9 | 1.2 | DIN 6923 | 50 | 000000000 | 00000 |
| M10 | 1.5 | 15 | 10 | 21.8 | 1.5 | DIN 6923 | 25 | 000000000 | 00000 |
| M12 | 1.75 | 18 | 12 | 26 | 1.8 | DIN 6923 | 10 | 000000000 | 0000 |
| M16 | 2 | 24 | 16 | 34.5 | 2.4 | DIN 6923 | 5 | 000000000 | 00000 |
| M20 | 2.5 | 30 | 20 | 42.8 | 3 | DIN 6923 | 1 | 000000000 | 0000 |
Steel—Class 10 | |||||||||
| M5 | 0.8 | 8 | 5 | 11.8 | 1 | DIN 6923 | 25 | 000000000 | 0000 |
| M6 | 1 | 10 | 6 | 14.2 | 1.1 | DIN 6923 | 50 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 8 | 17.9 | 1.2 | DIN 6923 | 50 | 000000000 | 00000 |
| M10 | 1.5 | 15 | 10 | 21.8 | 1.5 | DIN 6923 | 25 | 000000000 | 0000 |
| M12 | 1.75 | 18 | 12 | 26 | 1.8 | DIN 6923 | 10 | 000000000 | 0000 |
| M16 | 2 | 24 | 16 | 34.5 | 2.4 | DIN 6923 | 5 | 000000000 | 00000 |
| M20 | 2.5 | 30 | 20 | 42.8 | 3 | DIN 6923 | 1 | 000000000 | 0000 |
Metric High-Strength Steel Nylon-Insert
Flange Locknuts—Class 10
A nylon insert firmly grips threads to resist loosening and a flange distributes the load over a large area. They’re reusable, but their holding power lessens with each use. Made from Class 10 steel, they're about 25% stronger than medium-strength steel flange nuts and comparable in strength to Class 10.9 bolts. They have a zinc-yellow chromate plating to resist corrosion in wet environments. Height includes the flange.
For technical drawings and 3-D models, click on a part number.
Thread | Flange | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—Class 10 | ||||||||||
| M6 | 1 | 10 | 9.1 | 14.2 | 1.1 | 250° | DIN 6926 | 50 | 000000000 | 000000 |
| M8 | 1.25 | 13 | 11 | 17.9 | 1.2 | 250° | DIN 6926 | 50 | 000000000 | 00000 |
| M10 | 1.5 | 15 | 13.5 | 21.8 | 1.5 | 250° | DIN 6926 | 25 | 000000000 | 00000 |
| M12 | 1.75 | 18 | 16.1 | 26 | 1.8 | 250° | DIN 6926 | 25 | 000000000 | 00000 |
| M14 | 2 | 21 | 18.2 | 29.9 | 2.1 | 250° | DIN 6926 | 10 | 000000000 | 00000 |
| M16 | 2 | 24 | 20.3 | 34.5 | 2.4 | 250° | DIN 6926 | 5 | 000000000 | 00000 |
| M20 | 2.5 | 30 | 24.8 | 42.8 | 3 | 250° | DIN 6926 | 1 | 000000000 | 0000 |
Metric High-Strength Steel Distorted-Thread
Flange Locknuts—Class 10
Grip metric bolts more securely than nylon-insert flange locknuts—the irregularly shaped threads on these locknuts hold extra tight. They resist vibration and sudden shocks, even after multiple uses. Thanks to their flange, these nuts distribute pressure across a greater area than standard nuts, so you don’t need to add a washer. However, they may not fit in tight spaces. Made of high-strength, Class 10 steel, these nuts are about 25% stronger than medium-strength steel flange nuts. Their strength is comparable to Class 10.9 bolts. A zinc plating protects the steel under it from rust, extending the life of the nut.
These flange nuts meet DIN and ISO dimensional standards that confirm their compatibility with other parts and tools. ISO 7044 is functionally equivalent to DIN 1664 (formerly DIN 6927).
For technical drawings and 3-D models, click on a part number.
Thread | Flange | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 10 | |||||||||
| M6 | 1 | 10 | 6 | 14.2 | 1.1 | DIN 1664, DIN 6927, ISO 7044 | 50 | 0000000 | 000000 |
| M8 | 1.25 | 13 | 8 | 17.9 | 1.2 | DIN 1664, DIN 6927, ISO 7044 | 25 | 0000000 | 0000 |
| M10 | 1.5 | 15 | 10 | 21.8 | 1.5 | DIN 1664, DIN 6927, ISO 7044 | 10 | 0000000 | 0000 |
| M12 | 1.75 | 18 | 12 | 26 | 1.8 | DIN 1664, DIN 6927, ISO 7044 | 10 | 0000000 | 00000 |
| M14 | 2 | 21 | 14 | 29.9 | 2.1 | DIN 1664, DIN 6927, ISO 7044 | 5 | 0000000 | 00000 |
| M16 | 2 | 24 | 16 | 34.5 | 2.4 | DIN 1664, DIN 6927, ISO 7044 | 1 | 0000000 | 0000 |
| M20 | 2.5 | 30 | 20 | 42.8 | 3 | DIN 1664, DIN 6927, ISO 7044 | 1 | 0000000 | 0000 |